lavfi: unify src_buffer and buffersrc.

Most of the code is moved to buffersrc.c
to help Git see the similarities.

src_buffer.c still contains the obsolete compatibility functions.

The format change detection code was removed as it has been
implemented directly in ffmpeg.
It can easily be brought back from the history.

4 files changed, 97 insertions, 570 deletions

diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 1f9d4117d1..56c931a17d 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -28,6 +28,7 @@ OBJS = allfilters.o                                                     \
        avfiltergraph.o                                                  \
        buffer.o                                                         \
        buffersink.o                                                     \
+       buffersrc.o                                                      \
        defaults.o                                                       \
        drawutils.o                                                      \
        formats.o                                                        \
diff --git a/libavfilter/buffersrc.c b/libavfilter/buffersrc.c
index 7cc80d8f5f..90f922ab9e 100644
--- a/libavfilter/buffersrc.c
+++ b/libavfilter/buffersrc.c
@@ -27,6 +27,7 @@
 #include "avfilter.h"
 #include "buffersrc.h"
 #include "formats.h"
+#include "internal.h"
 #include "vsrc_buffer.h"
 #include "avcodec.h"
 
@@ -40,11 +41,13 @@ typedef struct {
     const AVClass    *class;
     AVFifoBuffer     *fifo;
     AVRational        time_base;     ///< time_base to set in the output link
+    unsigned          nb_failed_requests;
 
     /* video only */
     int               h, w;
     enum PixelFormat  pix_fmt;
     AVRational        pixel_aspect;
+    char              sws_param[256];
 
     /* audio only */
     int sample_rate;
@@ -69,6 +72,44 @@ typedef struct {
         return AVERROR(EINVAL);\
     }
 
+static AVFilterBufferRef *copy_buffer_ref(AVFilterContext *ctx,
+                                          AVFilterBufferRef *ref)
+{
+    AVFilterLink *outlink = ctx->outputs[0];
+    AVFilterBufferRef *buf;
+    int channels;
+
+    switch (outlink->type) {
+
+    case AVMEDIA_TYPE_VIDEO:
+        buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
+                                        ref->video->w, ref->video->h);
+        if(!buf)
+            return NULL;
+        av_image_copy(buf->data, buf->linesize,
+                      (void*)ref->data, ref->linesize,
+                      ref->format, ref->video->w, ref->video->h);
+        break;
+
+    case AVMEDIA_TYPE_AUDIO:
+        buf = ff_get_audio_buffer(outlink, AV_PERM_WRITE,
+                                        ref->audio->nb_samples);
+        if(!buf)
+            return NULL;
+        channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout);
+        av_samples_copy(buf->extended_data, ref->buf->extended_data,
+                        0, 0, ref->audio->nb_samples,
+                        channels,
+                        ref->format);
+        break;
+
+    default:
+        return NULL;
+    }
+    avfilter_copy_buffer_ref_props(buf, ref);
+    return buf;
+}
+
 #if FF_API_VSRC_BUFFER_ADD_FRAME
 static int av_vsrc_buffer_add_frame_alt(AVFilterContext *buffer_filter, AVFrame *frame,
                              int64_t pts, AVRational pixel_aspect)
@@ -88,59 +129,42 @@ static int av_vsrc_buffer_add_frame_alt(AVFilterContext *buffer_filter, AVFrame
 }
 #endif
 
-int av_buffersrc_write_frame(AVFilterContext *buffer_filter, AVFrame *frame)
+int av_buffersrc_add_frame(AVFilterContext *buffer_src,
+                           const AVFrame *frame, int flags)
 {
-    BufferSourceContext *c = buffer_filter->priv;
-    AVFilterBufferRef *buf;
+    AVFilterBufferRef *picref;
     int ret;
 
-    if (!frame) {
-        c->eof = 1;
-        return 0;
-    } else if (c->eof)
-        return AVERROR(EINVAL);
+    if (!frame) /* NULL for EOF */
+        return av_buffersrc_add_ref(buffer_src, NULL, flags);
 
-    if (!av_fifo_space(c->fifo) &&
-        (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
-                                         sizeof(buf))) < 0)
-        return ret;
-
-    switch (buffer_filter->outputs[0]->type) {
+    switch (buffer_src->outputs[0]->type) {
     case AVMEDIA_TYPE_VIDEO:
-        CHECK_VIDEO_PARAM_CHANGE(buffer_filter, c, frame->width, frame->height,
-                                 frame->format);
-        buf = avfilter_get_video_buffer(buffer_filter->outputs[0], AV_PERM_WRITE,
-                                        c->w, c->h);
-        av_image_copy(buf->data, buf->linesize, frame->data, frame->linesize,
-                      c->pix_fmt, c->w, c->h);
+        picref = avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE);
         break;
     case AVMEDIA_TYPE_AUDIO:
-        CHECK_AUDIO_PARAM_CHANGE(buffer_filter, c, frame->sample_rate, frame->channel_layout,
-                                 frame->format);
-        buf = ff_get_audio_buffer(buffer_filter->outputs[0], AV_PERM_WRITE,
-                                  frame->nb_samples);
-        av_samples_copy(buf->extended_data, frame->extended_data,
-                        0, 0, frame->nb_samples,
-                        av_get_channel_layout_nb_channels(frame->channel_layout),
-                        frame->format);
+        picref = avfilter_get_audio_buffer_ref_from_frame(frame, AV_PERM_WRITE);
         break;
     default:
-        return AVERROR(EINVAL);
-    }
-
-    avfilter_copy_frame_props(buf, frame);
-
-    if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
-        avfilter_unref_buffer(buf);
-        return ret;
+        return AVERROR(ENOSYS);
     }
+    if (!picref)
+        return AVERROR(ENOMEM);
+    ret = av_buffersrc_add_ref(buffer_src, picref, flags);
+    picref->buf->data[0] = NULL;
+    avfilter_unref_buffer(picref);
+    return ret;
+}
 
-    return 0;
+int av_buffersrc_write_frame(AVFilterContext *buffer_filter, AVFrame *frame)
+{
+    return av_buffersrc_add_frame(buffer_filter, frame, 0);
 }
 
-int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
+int av_buffersrc_add_ref(AVFilterContext *s, AVFilterBufferRef *buf, int flags)
 {
     BufferSourceContext *c = s->priv;
+    AVFilterBufferRef *to_free = NULL;
     int ret;
 
     if (!buf) {
@@ -154,6 +178,8 @@ int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
                                          sizeof(buf))) < 0)
         return ret;
 
+    if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
+        /* TODO reindent */
     switch (s->outputs[0]->type) {
     case AVMEDIA_TYPE_VIDEO:
         CHECK_VIDEO_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
@@ -165,39 +191,56 @@ int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
     default:
         return AVERROR(EINVAL);
     }
+    }
+    if (!(flags & AV_BUFFERSRC_FLAG_NO_COPY))
+        to_free = buf = copy_buffer_ref(s, buf);
+    if(!buf)
+        return -1;
 
-    if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0)
+    if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
+        avfilter_unref_buffer(to_free);
         return ret;
+    }
+    c->nb_failed_requests = 0;
 
     return 0;
 }
 
+int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
+{
+    return av_buffersrc_add_ref(s, buf, AV_BUFFERSRC_FLAG_NO_COPY);
+}
+
+unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
+{
+    return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
+}
+
 static av_cold int init_video(AVFilterContext *ctx, const char *args, void *opaque)
 {
     BufferSourceContext *c = ctx->priv;
     char pix_fmt_str[128];
-    int n = 0;
+    int ret, n = 0;
+    *c->sws_param = 0;
 
     if (!args ||
-        (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
+        (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
                     &c->time_base.num, &c->time_base.den,
-                    &c->pixel_aspect.num, &c->pixel_aspect.den)) != 7) {
-        av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but %d found in '%s'\n", n, args);
+                    &c->pixel_aspect.num, &c->pixel_aspect.den, c->sws_param)) < 7) {
+        av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
         return AVERROR(EINVAL);
     }
-    if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == PIX_FMT_NONE) {
-        char *tail;
-        c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
-        if (*tail || c->pix_fmt < 0 || c->pix_fmt >= PIX_FMT_NB) {
-            av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", pix_fmt_str);
-            return AVERROR(EINVAL);
-        }
-    }
+
+    if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
+        return ret;
 
     if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*))))
         return AVERROR(ENOMEM);
 
-    av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s\n", c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name);
+    av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
+           c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
+           c->time_base.num, c->time_base.den,
+           c->pixel_aspect.num, c->pixel_aspect.den, c->sws_param);
     return 0;
 }
 
@@ -335,6 +378,7 @@ static int request_frame(AVFilterLink *link)
     if (!av_fifo_size(c->fifo)) {
         if (c->eof)
             return AVERROR_EOF;
+        c->nb_failed_requests++;
         return AVERROR(EAGAIN);
     }
     av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
diff --git a/libavfilter/buffersrc.h b/libavfilter/buffersrc.h
index 27fc2867a0..cd6492e5cb 100644
--- a/libavfilter/buffersrc.h
+++ b/libavfilter/buffersrc.h
@@ -27,7 +27,6 @@
 
 #include "avfilter.h"
 
-#if 1
 enum {
 
     /**
@@ -63,7 +62,6 @@ int av_buffersrc_add_ref(AVFilterContext *buffer_src,
  */
 unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src);
 
-#else
 /**
  * Add a buffer to the filtergraph s.
  *
@@ -83,6 +81,5 @@ int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf);
  *          hit. Use av_buffersrc_buffer() to avoid copying the data.
  */
 int av_buffersrc_write_frame(AVFilterContext *s, AVFrame *frame);
-#endif
 
 #endif /* AVFILTER_BUFFERSRC_H */
diff --git a/libavfilter/src_buffer.c b/libavfilter/src_buffer.c
index 5bf629ce6b..981ae4d465 100644
--- a/libavfilter/src_buffer.c
+++ b/libavfilter/src_buffer.c
@@ -61,281 +61,12 @@ typedef struct {
     AVFilterContext *aresample;
 } BufferSourceContext;
 
-#define FIFO_SIZE 8
-
-#define CHECK_PARAM_CHANGE(s, c, width, height, format)\
-    if (c->w != width || c->h != height || c->pix_fmt != format) {\
-        av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
-        return AVERROR(EINVAL);\
-    }
-
 static void buf_free(AVFilterBuffer *ptr)
 {
     av_free(ptr);
     return;
 }
 
-static void set_link_source(AVFilterContext *src, AVFilterLink *link)
-{
-    link->src       = src;
-    link->srcpad    = &(src->output_pads[0]);
-    src->outputs[0] = link;
-}
-
-static int reconfigure_filter(BufferSourceContext *abuffer, AVFilterContext *filt_ctx)
-{
-    int ret;
-    AVFilterLink * const inlink  = filt_ctx->inputs[0];
-    AVFilterLink * const outlink = filt_ctx->outputs[0];
-
-    inlink->format         = abuffer->sample_format;
-    inlink->channel_layout = abuffer->channel_layout;
-    inlink->sample_rate    = abuffer->sample_rate;
-
-    filt_ctx->filter->uninit(filt_ctx);
-    memset(filt_ctx->priv, 0, filt_ctx->filter->priv_size);
-    if ((ret = filt_ctx->filter->init(filt_ctx, NULL , NULL)) < 0)
-        return ret;
-    if ((ret = inlink->srcpad->config_props(inlink)) < 0)
-        return ret;
-    return outlink->srcpad->config_props(outlink);
-}
-
-static int insert_filter(BufferSourceContext *abuffer,
-                         AVFilterLink *link, AVFilterContext **filt_ctx,
-                         const char *filt_name)
-{
-    int ret;
-
-    if ((ret = avfilter_open(filt_ctx, avfilter_get_by_name(filt_name), NULL)) < 0)
-        return ret;
-
-    link->src->outputs[0] = NULL;
-    if ((ret = avfilter_link(link->src, 0, *filt_ctx, 0)) < 0) {
-        link->src->outputs[0] = link;
-        return ret;
-    }
-
-    set_link_source(*filt_ctx, link);
-
-    if ((ret = reconfigure_filter(abuffer, *filt_ctx)) < 0) {
-        avfilter_free(*filt_ctx);
-        return ret;
-    }
-
-    return 0;
-}
-
-static void remove_filter(AVFilterContext **filt_ctx)
-{
-    AVFilterLink *outlink = (*filt_ctx)->outputs[0];
-    AVFilterContext *src  = (*filt_ctx)->inputs[0]->src;
-
-    (*filt_ctx)->outputs[0] = NULL;
-    avfilter_free(*filt_ctx);
-    *filt_ctx = NULL;
-
-    set_link_source(src, outlink);
-}
-
-static inline void log_input_change(void *ctx, AVFilterLink *link, AVFilterBufferRef *ref)
-{
-    char old_layout_str[16], new_layout_str[16];
-    av_get_channel_layout_string(old_layout_str, sizeof(old_layout_str),
-                                 -1, link->channel_layout);
-    av_get_channel_layout_string(new_layout_str, sizeof(new_layout_str),
-                                 -1, ref->audio->channel_layout);
-    av_log(ctx, AV_LOG_INFO,
-           "Audio input format changed: "
-           "%s:%s:%d -> %s:%s:%d, normalizing\n",
-           av_get_sample_fmt_name(link->format),
-           old_layout_str, (int)link->sample_rate,
-           av_get_sample_fmt_name(ref->format),
-           new_layout_str, ref->audio->sample_rate);
-}
-
-static int check_format_change_video(AVFilterContext *buffer_filter,
-                                     AVFilterBufferRef *picref)
-{
-    BufferSourceContext *c = buffer_filter->priv;
-    int ret;
-
-    if (picref->video->w != c->w || picref->video->h != c->h || picref->format != c->pix_fmt) {
-        AVFilterContext *scale = buffer_filter->outputs[0]->dst;
-        AVFilterLink *link;
-        char scale_param[1024];
-
-        av_log(buffer_filter, AV_LOG_INFO,
-               "Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
-               c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
-               picref->video->w, picref->video->h, av_pix_fmt_descriptors[picref->format].name);
-
-        if (!scale || strcmp(scale->filter->name, "scale")) {
-            AVFilter *f = avfilter_get_by_name("scale");
-
-            av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
-            if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0)
-                return ret;
-
-            c->scale = scale;
-
-            snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param);
-            if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) {
-                return ret;
-            }
-
-            if ((ret = avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0)) < 0) {
-                return ret;
-            }
-            scale->outputs[0]->time_base = scale->inputs[0]->time_base;
-
-            scale->outputs[0]->format= c->pix_fmt;
-        } else if (!strcmp(scale->filter->name, "scale")) {
-            snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s",
-                     scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param);
-            scale->filter->init(scale, scale_param, NULL);
-        }
-
-        c->pix_fmt = scale->inputs[0]->format = picref->format;
-        c->w       = scale->inputs[0]->w      = picref->video->w;
-        c->h       = scale->inputs[0]->h      = picref->video->h;
-
-        link = scale->outputs[0];
-        if ((ret =  link->srcpad->config_props(link)) < 0)
-            return ret;
-    }
-    return 0;
-}
-
-static int check_format_change_audio(AVFilterContext *ctx,
-                                     AVFilterBufferRef *samplesref)
-{
-    BufferSourceContext *abuffer = ctx->priv;
-    AVFilterLink *link;
-    int ret, logged = 0;
-
-    link = ctx->outputs[0];
-    if (samplesref->audio->sample_rate    != link->sample_rate    ||
-        samplesref->format                != link->format         ||
-        samplesref->audio->channel_layout != link->channel_layout) {
-
-        log_input_change(ctx, link, samplesref);
-        logged = 1;
-
-        abuffer->sample_rate    = samplesref->audio->sample_rate;
-        abuffer->sample_format  = samplesref->format;
-        abuffer->channel_layout = samplesref->audio->channel_layout;
-
-        if (!abuffer->aresample) {
-            ret = insert_filter(abuffer, link, &abuffer->aresample, "aresample");
-            if (ret < 0) return ret;
-        } else {
-            link = abuffer->aresample->outputs[0];
-            if (samplesref->audio->sample_rate    == link->sample_rate    &&
-                samplesref->format                == link->format         &&
-                samplesref->audio->channel_layout == link->channel_layout)
-                remove_filter(&abuffer->aresample);
-            else
-                if ((ret = reconfigure_filter(abuffer, abuffer->aresample)) < 0)
-                    return ret;
-        }
-    }
-
-
-    return 0;
-}
-
-static int check_format_change(AVFilterContext *buffer_filter,
-                               AVFilterBufferRef *picref)
-{
-    switch (buffer_filter->outputs[0]->type) {
-    case AVMEDIA_TYPE_VIDEO:
-        return check_format_change_video(buffer_filter, picref);
-    case AVMEDIA_TYPE_AUDIO:
-        return check_format_change_audio(buffer_filter, picref);
-    default:
-        return AVERROR(ENOSYS);
-    }
-}
-
-static AVFilterBufferRef *copy_buffer_ref(AVFilterContext *ctx,
-                                          AVFilterBufferRef *ref)
-{
-    AVFilterLink *outlink = ctx->outputs[0];
-    AVFilterBufferRef *buf;
-    int channels, data_size, i;
-
-    switch (outlink->type) {
-
-    case AVMEDIA_TYPE_VIDEO:
-        buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
-                                        ref->video->w, ref->video->h);
-        if(!buf)
-            return NULL;
-        av_image_copy(buf->data, buf->linesize,
-                      (void*)ref->data, ref->linesize,
-                      ref->format, ref->video->w, ref->video->h);
-        break;
-
-    case AVMEDIA_TYPE_AUDIO:
-        buf = ff_get_audio_buffer(outlink, AV_PERM_WRITE,
-                                        ref->audio->nb_samples);
-        if(!buf)
-            return NULL;
-        channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout);
-        av_samples_copy(buf->extended_data, ref->buf->extended_data,
-                        0, 0, ref->audio->nb_samples,
-                        channels,
-                        ref->format);
-        break;
-
-    default:
-        return NULL;
-    }
-    avfilter_copy_buffer_ref_props(buf, ref);
-    return buf;
-}
-
-int av_buffersrc_add_ref(AVFilterContext *buffer_filter,
-                         AVFilterBufferRef *picref, int flags)
-{
-    BufferSourceContext *c = buffer_filter->priv;
-    AVFilterBufferRef *buf;
-    int ret;
-
-    if (!picref) {
-        c->eof = 1;
-        return 0;
-    } else if (c->eof)
-        return AVERROR(EINVAL);
-
-    if (!av_fifo_space(c->fifo) &&
-        (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
-                                         sizeof(buf))) < 0)
-        return ret;
-
-    if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
-        ret = check_format_change(buffer_filter, picref);
-        if (ret < 0)
-            return ret;
-    }
-    if (flags & AV_BUFFERSRC_FLAG_NO_COPY)
-        buf = picref;
-    else
-        buf = copy_buffer_ref(buffer_filter, picref);
-    if(!buf)
-        return -1;
-
-    if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
-        if (buf != picref)
-            avfilter_unref_buffer(buf);
-        return ret;
-    }
-    c->nb_failed_requests = 0;
-
-    return 0;
-}
-
 int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter,
                                         AVFilterBufferRef *picref, int flags)
 {
@@ -345,33 +76,6 @@ int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter,
 #if CONFIG_AVCODEC
 #include "avcodec.h"
 
-int av_buffersrc_add_frame(AVFilterContext *buffer_src,
-                           const AVFrame *frame, int flags)
-{
-    AVFilterBufferRef *picref;
-    int ret;
-
-    if (!frame) /* NULL for EOF */
-        return av_buffersrc_add_ref(buffer_src, NULL, flags);
-
-    switch (buffer_src->outputs[0]->type) {
-    case AVMEDIA_TYPE_VIDEO:
-        picref = avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE);
-        break;
-    case AVMEDIA_TYPE_AUDIO:
-        picref = avfilter_get_audio_buffer_ref_from_frame(frame, AV_PERM_WRITE);
-        break;
-    default:
-        return AVERROR(ENOSYS);
-    }
-    if (!picref)
-        return AVERROR(ENOMEM);
-    ret = av_buffersrc_add_ref(buffer_src, picref, flags);
-    picref->buf->data[0] = NULL;
-    avfilter_unref_buffer(picref);
-    return ret;
-}
-
 int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
                              const AVFrame *frame, int flags)
 {
@@ -379,193 +83,11 @@ int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
 }
 #endif
 
-unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
-{
-    return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
-}
-
 unsigned av_vsrc_buffer_get_nb_failed_requests(AVFilterContext *buffer_src)
 {
     return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
 }
 
-static av_cold int init_video(AVFilterContext *ctx, const char *args, void *opaque)
-{
-    BufferSourceContext *c = ctx->priv;
-    char pix_fmt_str[128];
-    int ret, n = 0;
-    *c->sws_param = 0;
-
-    if (!args ||
-        (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
-                    &c->time_base.num, &c->time_base.den,
-                    &c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den, c->sws_param)) < 7) {
-        av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
-        return AVERROR(EINVAL);
-    }
-
-    if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
-        return ret;
-
-    if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*))))
-        return AVERROR(ENOMEM);
-
-    av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
-           c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
-           c->time_base.num, c->time_base.den,
-           c->sample_aspect_ratio.num, c->sample_aspect_ratio.den, c->sws_param);
-    return 0;
-}
-
-static av_cold int init_audio(AVFilterContext *ctx, const char *args0, void *opaque)
-{
-    BufferSourceContext *abuffer = ctx->priv;
-    char *arg = NULL, *ptr, chlayout_str[16];
-    char *args = av_strdup(args0);
-    int ret;
-
-    arg = av_strtok(args, ":", &ptr);
-
-#define ADD_FORMAT(fmt_name)                                            \
-    if (!arg)                                                           \
-        goto arg_fail;                                                  \
-    if ((ret = ff_parse_##fmt_name(&abuffer->fmt_name, arg, ctx)) < 0) { \
-        av_freep(&args);                                                \
-        return ret;                                                     \
-    }                                                                   \
-    if (*args)                                                          \
-        arg = av_strtok(NULL, ":", &ptr)
-
-    ADD_FORMAT(time_base);
-    ADD_FORMAT(sample_rate);
-    ADD_FORMAT(sample_format);
-    ADD_FORMAT(channel_layout);
-
-    abuffer->fifo = av_fifo_alloc(FIFO_SIZE*sizeof(AVFilterBufferRef*));
-    if (!abuffer->fifo) {
-        av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo, filter init failed.\n");
-        return AVERROR(ENOMEM);
-    }
-
-    av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str),
-                                 -1, abuffer->channel_layout);
-    av_log(ctx, AV_LOG_INFO, "format:%s layout:%s rate:%d\n",
-           av_get_sample_fmt_name(abuffer->sample_format), chlayout_str,
-           abuffer->sample_rate);
-    av_freep(&args);
-
-    return 0;
-
-arg_fail:
-    av_log(ctx, AV_LOG_ERROR, "Invalid arguments, must be of the form "
-                              "sample_rate:sample_fmt:channel_layout\n");
-    av_freep(&args);
-    return AVERROR(EINVAL);
-}
-
-static av_cold void uninit(AVFilterContext *ctx)
-{
-    BufferSourceContext *s = ctx->priv;
-    while (s->fifo && av_fifo_size(s->fifo)) {
-        AVFilterBufferRef *buf;
-        av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
-        avfilter_unref_buffer(buf);
-    }
-    av_fifo_free(s->fifo);
-    s->fifo = NULL;
-    avfilter_free(s->scale);
-    s->scale = NULL;
-}
-
-static int query_formats_video(AVFilterContext *ctx)
-{
-    BufferSourceContext *c = ctx->priv;
-    enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
-
-    avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
-    return 0;
-}
-
-static int query_formats_audio(AVFilterContext *ctx)
-{
-    BufferSourceContext *abuffer = ctx->priv;
-    AVFilterFormats *formats;
-    AVFilterChannelLayouts *layouts;
-
-    formats = NULL;
-    avfilter_add_format(&formats, abuffer->sample_format);
-    avfilter_set_common_sample_formats(ctx, formats);
-
-    formats = NULL;
-    avfilter_add_format(&formats, abuffer->sample_rate);
-    ff_set_common_samplerates(ctx, formats);
-
-    layouts = NULL;
-    ff_add_channel_layout(&layouts, abuffer->channel_layout);
-    ff_set_common_channel_layouts(ctx, layouts);
-
-    return 0;
-}
-
-static int config_output_video(AVFilterLink *link)
-{
-    BufferSourceContext *c = link->src->priv;
-
-    link->w = c->w;
-    link->h = c->h;
-    link->sample_aspect_ratio = c->sample_aspect_ratio;
-    link->time_base = c->time_base;
-
-    return 0;
-}
-
-static int config_output_audio(AVFilterLink *outlink)
-{
-    BufferSourceContext *abuffer = outlink->src->priv;
-    outlink->sample_rate = abuffer->sample_rate;
-    outlink->time_base   = abuffer->time_base;
-    return 0;
-}
-
-static int request_frame(AVFilterLink *link)
-{
-    BufferSourceContext *c = link->src->priv;
-    AVFilterBufferRef *buf;
-
-    if (!av_fifo_size(c->fifo)) {
-        if (c->eof)
-            return AVERROR_EOF;
-        c->nb_failed_requests++;
-        return AVERROR(EAGAIN);
-    }
-    av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
-
-    switch (link->type) {
-    case AVMEDIA_TYPE_VIDEO:
-        avfilter_start_frame(link, avfilter_ref_buffer(buf, ~0));
-        avfilter_draw_slice(link, 0, link->h, 1);
-        avfilter_end_frame(link);
-        avfilter_unref_buffer(buf);
-        break;
-    case AVMEDIA_TYPE_AUDIO:
-        ff_filter_samples(link, avfilter_ref_buffer(buf, ~0));
-        avfilter_unref_buffer(buf);
-        break;
-    default:
-        return AVERROR(ENOSYS);
-    }
-    return 0;
-}
-
-static int poll_frame(AVFilterLink *link)
-{
-    BufferSourceContext *c = link->src->priv;
-    int size = av_fifo_size(c->fifo);
-    if (!size && c->eof)
-        return AVERROR_EOF;
-    return size/sizeof(AVFilterBufferRef*);
-}
-
 int av_asrc_buffer_add_audio_buffer_ref(AVFilterContext *ctx,
                                         AVFilterBufferRef *samplesref,
                                         int av_unused flags)
@@ -619,40 +141,3 @@ int av_asrc_buffer_add_buffer(AVFilterContext *ctx,
                                       pts, flags);
     )
 }
-
-AVFilter avfilter_vsrc_buffer = {
-    .name      = "buffer",
-    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
-    .priv_size = sizeof(BufferSourceContext),
-    .query_formats = query_formats_video,
-
-    .init      = init_video,
-    .uninit    = uninit,
-
-    .inputs    = (const AVFilterPad[]) {{ .name = NULL }},
-    .outputs   = (const AVFilterPad[]) {{ .name      = "default",
-                                    .type            = AVMEDIA_TYPE_VIDEO,
-                                    .request_frame   = request_frame,
-                                    .poll_frame      = poll_frame,
-                                    .config_props    = config_output_video, },
-                                  { .name = NULL}},
-};
-
-AVFilter avfilter_asrc_abuffer = {
-    .name        = "abuffer",
-    .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
-    .priv_size   = sizeof(BufferSourceContext),
-    .query_formats = query_formats_audio,
-
-    .init        = init_audio,
-    .uninit      = uninit,
-
-    .inputs      = (const AVFilterPad[]) {{ .name = NULL }},
-    .outputs     = (const AVFilterPad[]) {{ .name      = "default",
-                                      .type            = AVMEDIA_TYPE_AUDIO,
-                                      .request_frame   = request_frame,
-                                      .poll_frame      = poll_frame,
-                                      .config_props    = config_output_audio, },
-                                    { .name = NULL}},
-};
-